Pipe and method of making the same



Dec. 21, 1937. c 5, PATTQN 2,102,969

PIPE AND METHOD OF MAKING THE SAME Filed Nov. 2, 1954 v INVENTOR.

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Patented Dec. 21, 193 7 PATENT OFFICE F rs ND METHOD or MAKING THE SAME Guyler S. Patton, Scarsdale, N. Y.,- assignor to Alco Products Incorporated, New York, N. Y., a corporation of Delaware Application November 2, 1934, Serial No. 751,164

9 Claims.

My invention relates tofluid conduits and more particularly to improvements in lined pipe and method of making the same.

In the past, steelpipe has been extensively used throughout the world for water supply. It

has been found, however, that during the passage of time steel, even though coated with various enamels, tends to rust and to tuberculate which cuts down the capacity of the pipe line for carrying purposes. It has been found that the use of a concrete or cement lining within the pipe eliminates or 'at least minimizes the in the pipe as, due to the liinberness or ductility of the pipe, the cement had a tendency to break off. I

Ordinarily, a concrete pipe is several inches thick and has a very excessive weight per foot. It is usually formed with'reinforcing bars cast within it and sometimes is further protected by a thin steel shell. 7

Steel pipe is obviously susceptible to corrosion and in addition has a rather high weight per unit of length due to the necessity of an excessive allowance to allow for corrosion.

One object of my invention is to provide a metal pipe so constructed and arranged as to reduce breaking or spalling of an internal concrete lining. V i V a A further object of my invention is to provide a lined pipe of high fluid capacity. 1

Another object of my invention is to provide a lined metal pipe for transporting fluids which has a low weight per unit of length, is resistant to corrosion and has high longitudinal and transverse stiffness.

Still another object of my invention is to provide a method of assembling a concrete lined metal pipe. 7

Other and further objects of my invention appended claims.

In the accompanying drawing which forms part of the instant specification and which is r to be read in conjunction therewith and in parts throughwill appear from the following description and Figure 2 is a sectionalview taken on the line 2-2 of Figure 1.

Figure 3 is a fragmentary enlarged sectional view taken on the line 33 of Figure 2.

Figure 4 is a sectional View taken on the line l-ad of Figure 3. Y

Figure 5 is a fragmentary sectional view of a rolled plate of modified form before it is formed into a pipe shell.

Figure 6 is an elevation, partly in section, of another form of pipe embodying my invention. Figure 7 is a fragmentary, enlarged sectional view taken on the linel-J of Figure 6.

In general, the pipe is formed by an external metal shell built up from a rolled steel plate. This plate may be formed with relatively'deep corrugations or alternatively may be smooth on one side and provided with'relatively deep proj ections on the other. These ridges in either from preferably run at right angles to the length of the plate, but may run longitudinally if desired. An internal reinforcing is formed by connecting the tops of the projections by elongated steel rods running at an angle to the projections. These rods may be secured to the projections by welding or other suitable means. The reinforced shell is then placed in a machine or device which will rotate the pipe about its longitudinal axis at a high rate of speed, during which time cement and/or concrete is introduced to the interior and centrifugally applied to the inner surface of the pipe. The ridges and the reinforcing thus serve to hold the concrete lining to the pipe and prevent it from spalling or breaking away. I

More particularly, referring now to the drawing, a rolled steel plate provided with corrugations I isformed into a tubular shell, the longitudinal edges of the plate being joined by welding or in any other suitable manner. The plate may be formed to tubular form with the corrugations l disposed either transversely of the longitudinal axis of the pipe as shown in Figures' l and 3, or longitudinally of the pipe as shown in Figures 6 and 7. If desired, the corrugations may be made to run diagonally. Alternatives of adapted to rotate the pipe around its longitudinal axis at a high speed. While the pipe is so rotating, a cement or concrete mix is fed into the interior of the pipe. I'he centrifugal force produced by the rotation will distribute the cement evenly and smoothly throughout the interior surface of the pipe. Sufficient cement is fed to cover the rods 4 a desired amount. The rotation may be continued until the cement is set to form a smooth concrete lining 5 embedding rods 4 and covering the welds 6 by which the rods 4 are cemented to the projections 3.

It will be obvious that I have accomplished the objects of my invention. I have provided a rigid, light, corrosion-resisting pipe of high fluid capacity. The construction is such that the concrete or cement lining is securely held in place and the tendency toward breaking off of sections of concrete due to flexing of the pipe is minimized.

It will be observed that certain feature combinations and sub-combinations are of utility and may be employed without reference to other features and sub-combinations. This is contemplated by and is within the scope of the appended claims. It is further obvious that variations may be made in details, within the scope of the claims appearing below, without departing from the spirit of my invention. It is, therefore, to be understood that my invention is not to be limited to the specific details shown and described.

Having thus described my invention, what I claim is:

1. A pipe comprising in combination an outer shell having projections on its inner surface, a lining engaging said inner surface and a plurality of reinforcing members disposed in said lining and connected to said projections.

2. A pipe as in claim 1, the reinforcing members of which are elongated steel rods.

3. A pipe comprising in combination an outer steel shell having a plurality of internal projections, a concrete lining internally engaging said shell, and a plurality of steel'reinforcing rods disposed at least in part in said lining and fixedly connected to said projections.

4. A pipe as in claim 3, said reinforcing rods being disposed in said pipe extending at an angle to and welded to the projections.

5. A pipe as defined by claim 3, each of said projections forming a circumferential ring extending transversely to the longitudinal axis of said pipe.

6. A pipe as in claim 3 wherein said projections extend longitudinally.

7. A pipe comprising in combination an outer corrugated shell, a non-metallic lining in close surface contact therewith, and a plurality of reinforcing members disposed in said lining and fixedly connected to said corrugations.

3. A water pipe comprising in combination an outer corrugated steel shell, a concrete lining internally engaging said shell, and a plurality of steel reinforcing rods disposed at least in part in said lining and welded to said corrugations.

9. A pipe as defined by claim 3, said reinforcing rods being longitudinally arranged in said pipe and welded to the corrugations.

CUYLER S. PATION. 

